Expansion-joint for roads.



A. S. SPIEGEL.

EXPANSION JOINT F08 ROADS.

APPLICATION FILED IULY 21.1917.

Patented Oct. 1, 1918.

GOA/CR E T 5 ROAD 2 Inuenior:

2 SMS'pi eZ, MMMVLa A Q-s to provide a joint which will not only be elastic but which will become integral with man sraaas P T @FMCE ALEXANDER s. srn aeuzr, or CHICAGO, rumors.

EXPANSIoN-JoINT FOR ROADS.

To all whom it may concern:

Be it known that I, ALEXANDER S. SPIEGEL,

a citizen of the United States, and resident of Chicago, Illinois, have invented certain new and useful Improvements in Expansion-Joints for Roads, of which the following is a specification.

My invention relates to what is known as an expansible joint for pavements to com- 1c pensate' for the contraction and expansion of the material comprising a pavement and at the same time the invention aims to make such a joint as will prevent the passage of Water beneaththe road bed.-

I aim in the present form of my invention the material of the road to such an extent as neither heatnorcold will cause a separation at the point of juncture.

In the accompanying drawing,

Figure '1 shows one form of my improved joint. I

Fig. 2 shows a second form. Fig. 3 shows a third form. v

' In carrying out my invention I use a compound 1, which consists of asphalt, saw-dust,

spent tan bark or like ingredients having a certain degree of elasticity and as shown in F ig. 1 I use this as the -body or center of the joint. I confine the elastic compound between two felt strips 2 saturated with asphalt which not only holds the central compound in place but adheres closely with it naturally. Upon the saturated felt I apply a coating of asphalt3 of a high melting point and then I apply to this surface crushed stone. Thus I secure a roughened outer face which adheres readily to the face of the road bed exposed to it not only forming a close connection. but preventing displacement by reason-of the roughened character of the outer face of thejoint, due to the crushed stone and it will be observed that while there is a close connection be:

tween the outer face of the join'tand the adjacent face of the road I have'provided between the confining walls of saturated felt I an elastic body medium which permits contraction and expansion without permitting separation of the joint either as to its component parts or inxits connection with the adjacent road bed.

While I prefer the form shown in Fig. 1 I may, as shown in Fig. 2, use a central strengthening strip of felt 2, Fig. 2, being in all other respects like Fig. 1.

An inferior type of-jointmay be made, as shown in Fig. 3, by omitting the outer confitn ng walls of felt using simply the central s rlp. i

The advantages of my construction are as follows;

1. When the concrete road is laid the crushed stone surface or wall of the expansionjoint will unite with the concrete and become an integral part of the road.

2. As in my joint the crushed stone 1 embedded into the coating, as in Fig. 1, and becomesa part of the road bed, the contraction or expansion of the road bed will simply expand or contract the elastic compound without actual separation of the joint.

3. The use ofthe coating also prevents the drying up of the felt, as the felt saturated as it is with a very light and oily asphalt would soonevaporate unless protected by the coat- What I. claim is 1. In combination, concrete members, and

Patented Oct. 1, 1918. Application filed J'u1y'21, 1917. SerialNo.182,O19.

an interposed'joint filler of resilient material having surface layers of non-resilient material which are adhesively afiixed to the resilient filler and bonded to the concrete members.

coarse granular material partially embedded in and adherin to the surface of said compressible material and adapted to bond with plastic material cast in contact with said granular material.

4. An expansion joint for pavementsor Y road beds comprising two surface coatings,

crushed stone embedded therein and an' elastic compound between the coatings, sub 1 stantially as described;

. 35 2. In combination, a concrete member, and

5. In an elastic joint for road beds, two support for said body material, outer coatconfining Walls of felt coated upon their ings and crushed stone or the like embedded 10 outer faces, crushed stone embedded in the in said outer coatings. coatings and an elastic compound between 5 the felt Walls, substantially as described. ALEXANDER SPIEGEL' 6. In an expansion joint, an elastic center Witnesses: of body material, means for confining said WM. HART ANN,

body material, means acting as a stay or ALEX BARBIE. 

